Pumabuild do a bell and rotar arrangement and Chris Alison does one as well. Both have websites I personally don't use bell and rotar I've still got Alcons. It's hard now to just get discs as the Alcons if available are really expensive. I've no experience of using other disc options.

searching is fruitful | I'm a sponge not a mechanic | The Wiki is cool, please do check there if stuck with a Puma problem whilst waiting for a reply | For the Puma fan this read 'The Inside Story Book' is very nice to own link coming soon